SpongeBob SquarePants is an American animated television series created by marine biologist and animator Stephen Hillenburg for Nickelodeon.
The series chronicles the adventures and endeavors of the title character and his various friends in the fictional underwater city of Bikini Bottom.
The series' popularity has made it a media franchise, as well as the highest rated series to ever air on Nickelodeon, and the most distributed property of MTV Networks.
Karen is Plankton's nagging computer "WIFE" and voice of reason. She apparently has a mind of her own to the point of making fun of Plankton. Karen usually helps Plankton in his schemes to steal the Krabby Patty secret formula, although on occasions Plankton rejects her ideas and then takes them as if they were his own. She has a sarcastic attitude towards Plankton, and it is revealed in The SpongeBob SquarePants movie that she never agreed to marry Plankton.